Round-bottom flasks Duran (refractory)
Set
Refractory round-bottomed flasks made of Duran glass
Round-bottomed flasks for use as reaction vessels or as reservoirs in distillations or extractions.
With reinforced rim, narrow neck. Durang glass has a slightly thicker wall and is resistant to extreme thermal shocks (which are not actually applicable in secondary schools).
Multiple variants available: see below for an overview
